<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
    </style>
    <!-- <script type="application/javascript" src="./js/01_script.js" defer="defer"></script> -->
    <script type="application/javascript" src="./js/01_script.js" async="async"></script>
</head>

<body>
    <script>
        alert("1");
    </script>
    <div>欢迎来到英雄联盟</div>
    <script>
        alert("2");
    </script>
    <script>
        alert("3");
    </script>
    <div>好运不会眷顾傻瓜</div>
    <script>
        alert("4");
    </script>
</body>

</html>